As far as Android goes, the S3 and HOX are likely to be the big phones of the summer. Expect the S3 to be a bit more popular, due to its universal availability. That may change, however, if VZW decides to bring on a HOX variant after the Incredible LTE comes out, as a direct successor to the Rezound. I don't see that as very likely, however.
Razr HD will likely be out this summer, but I wouldn't expect it to be nearly as big as the first Razr was, because of the S3. It'll be a great phone and very popular among Verizon customers, but its only for Verizon, at least at first, and won't be coming to other US carriers. With everyone expecting the Jellybean debut at Google IO, I'd imagine the next Nexus will be the next big thing internationally. Remains to be seen how and when Google implements their direct sales model, and whether this too will come to Verizon.
Keep in mind that phone enthusiasts such as ourselves are all pretty much aware of the policy change regarding unlimited data, and as such most all of us with upgrades are using them now for the S3. That means development should be huge, and most of us won't be buying something full retail for awhile now. So I couldn't say what is going to be the next device on Verizon that will be as popular among our community as the S3, but I'd guess nothing till the Nexus.